X-Git-Url: https://git.saurik.com/apple/system_cmds.git/blobdiff_plain/1a7e3f61d38d679bba59130891c2031b5a0092b6..bd6521f0fc816ab056bc71376f9706a69b3b52c1:/CPPUtil/UtilAbsTime.hpp

diff --git a/CPPUtil/UtilAbsTime.hpp b/CPPUtil/UtilAbsTime.hpp
new file mode 100644
index 0000000..8fe56b0
--- /dev/null
+++ b/CPPUtil/UtilAbsTime.hpp
@@ -0,0 +1,62 @@
+//
+//  UtilAbsTime.hpp
+//  CPPUtil
+//
+//  Created by James McIlree on 4/14/13.
+//  Copyright (c) 2013 Apple. All rights reserved.
+//
+
+#ifndef __CPPUtil__UtilAbsTime__
+#define __CPPUtil__UtilAbsTime__
+
+class NanoTime;
+
+class AbsTime {
+    protected:
+	uint64_t _time;
+
+    public:
+	// Minimum and Maximum possible values
+	static const AbsTime BEGINNING_OF_TIME;
+	static const AbsTime END_OF_TIME;
+
+	static AbsTime now();
+
+	AbsTime() : _time(0ULL) {}
+	explicit AbsTime(uint64_t t) : _time(t) {}
+
+	bool operator==(const AbsTime& rhs) const		{ return this->_time == rhs._time; }
+	bool operator!=(const AbsTime &rhs) const 		{ return !(*this == rhs); }
+
+	bool operator<(const AbsTime& rhs) const		{ return this->_time < rhs._time; }
+	bool operator<=(const AbsTime& rhs) const		{ return this->_time <= rhs._time; }
+	bool operator>(const AbsTime& rhs) const		{ return this->_time > rhs._time; }
+	bool operator>=(const AbsTime& rhs) const		{ return this->_time >= rhs._time; }
+
+	// We do not want to be able to mutate AbsTime(s)
+	// without type enforcement, but it is useful to be able
+	// to say "if (time == 0) {}", so we have value based
+	// operators for comparison
+	bool operator==(uint64_t value) const			{ return this->_time == value; }
+	bool operator!=(uint64_t value) const	 		{ return !(*this == value); }
+
+	bool operator<(uint64_t value) const			{ return this->_time < value; }
+	bool operator<=(uint64_t value) const			{ return this->_time <= value; }
+	bool operator>(uint64_t value) const			{ return this->_time > value; }
+	bool operator>=(uint64_t value) const			{ return this->_time >= value; }
+
+	AbsTime operator+(const AbsTime& rhs) const		{ return AbsTime(_time + rhs._time); }
+	AbsTime operator-(const AbsTime& rhs) const		{ return AbsTime(_time - rhs._time); }
+	AbsTime operator*(const AbsTime& rhs) const		{ return AbsTime(_time * rhs._time); }
+	AbsTime operator/(const AbsTime& rhs) const		{ return AbsTime(_time / rhs._time); }
+
+	AbsTime& operator+=(const AbsTime& rhs)			{ _time += rhs._time; return *this; }
+
+	NanoTime nano_time() const; // NOTE! Uses system mach_timebase_info, potentially expensive conversion costs.
+	NanoTime nano_time(mach_timebase_info_data_t timebase_info) const;
+
+	uint64_t value() const					{ return _time; }
+	double double_value() const				{ return (double)_time; }
+};
+
+#endif /* defined(__CPPUtil__UtilAbsTime__) */